[s4e13] The — Joining: Part 2

Batman and J'onn attempt to infiltrate Wayne Industries to use its satellites to disrupt the Joining's signal.

During the invasion, even Gotham's villains—including The Joker, Penguin, Bane, and Mr. Freeze —fight alongside the GCPD to defend their city.

The episode ends with Batman joining J'onn on the Watchtower space station, where he meets other heroes: Green Lantern, The Flash, Hawkman, and Green Arrow . [S4E13] The Joining: Part 2

With the help of Lucius Fox and Alfred, Batman successfully activates the satellites, causing the Joining’s ships to crash and shutting down the invasion for good. Key Characters & Cast Voice Actor Bruce Wayne / Batman Rino Romano Dick Grayson / Robin Evan Sabara Barbara Gordon / Batgirl Danielle Judovits Alfred Pennyworth Alastair Duncan Martian Manhunter Dorian Harewood Lucius Fox Louis Gossett Jr. Major Impact & Trivia

" The Joining: Part 2 " is the season finale of The Batman (2004) Season 4, originally airing on May 5, 2007. The episode concludes the high-stakes alien invasion arc and marks Batman's official transition from a solo vigilante to a member of the Justice League. Batman and J'onn attempt to infiltrate Wayne Industries

The robotic alien hive-mind known as has launched a full-scale attack on Earth. While Martian Manhunter (J'onn J'onzz) warns of the threat, Batman initially tries to stop the invasion alone to protect Batgirl and Robin from danger.

Encouraged by Alfred, Batgirl and Robin disobey Batman’s orders to stay behind and join the fight, eventually holding off robots while Batman hacks the system. The episode ends with Batman joining J'onn on

Upon arriving at the Watchtower, Batman reveals he had already hacked the League’s systems months prior as a "precaution". If you'd like, I can: Detail the Justice League's powers shown in the show. Compare this version of the Justice League to other series. Provide a summary of the Season 5 follow-up , "Lost Heroes." Which of these The Joining, Part 2 | The Batman (2004) Wiki | Fandom